Iván Carriño (Fundación Libertad y Progreso) pointed me out to an interesting exchange about the Keynesian multiplier. Steven Landsburg writes a post (follow-up here) using Rothbard’s critique (in Man, Economy, and State) of the Keynesian multiplier. Daniel Kuehn criticizes Landsburg’s (and therefore Rothbard’s) example (here, here and here). Paul Krugman also criticizes Landsburg saying that he used a «stupid argument.»
What’s going on? Is Rotbhard’s and Landsburg’s example so ill-founded as Kuehn argues? I’ll briefly summarize Rothbard’s and Landsburg’s example, then Kuehn’s reply and finally what I think has been left out.


Hay pocas cosas más cautivantes que escribir sobre historia del pensamiento económico. Una de ellas es escribir sobre pensamiento económico y epistemología de la economía. Quizás la única manera de superar lo atrapante de ese ejercicio conjunto sea escribir junto a 



